1342 results about "Oil drilling" patented technology

The invention provides a while-drilling formation pressure early warning method and device based on model prediction, equipment and a medium, and relates to the technical field of low-carbon mining, and the method comprises the steps: in a pre-drilling stage, based on seismic data, adjacent well historical data and design data, analyzing and generating prediction risk data of a target monitoring well; in the drilling process, actual formation pressure data are calculated in real time by using drilling data collected for a target monitoring well in real time, and the actual formation pressure data are compared with the predicted risk data; in the drilling stage, a pressure safety window is depicted based on the predicted risk data, the cycle equivalent density of the target monitoring well calculated in real time is compared with the safety window, and the drilling safety risk is recognized and analyzed; and after drilling is finished, summarizing the predicted risk data, the actual formation pressure data and the drilling safety risk, and updating and iterating the model algorithm through the summarized data. The method has the effect of improving the accuracy of formation pressure early warning while drilling in the petroleum drilling process.

A high-performance near-pure zinc alloy, a preparation method therefor and a use thereof, relating to the technical field of zinc alloys. The alloy component is that the content of Zn is greater than or equal to 99.5%, and the remaining trace alloy elements include at least two of the following 14 elements: Mg, Mn, Li, Cu, Ag, Ca, Sr, Fe, Zr, Ti, Al, C, Ga, and Si. The alloy has the yield strength ≥ 250 MPa, the tensile strength ≥ 320 MPa, the elongation ≥ 25%, the mechanical property change during one year of room-temperature storage ≤ 5%, the maximum bending force ≥ 2 kN, the stress corrosion sensitivity factor ≤ 15%, the size of corrosion pits after 60 days of immersion ≤ 15 μm, and the standard deviation of the size of corrosion pits ≤ 3 μm. The alloy is suitable for the preparation of biodegradable stents, bone implant devices, medical staplers or anastomotic nails for intestines, blood vessels or nerves, vascular clamps, guided bone or tissue regeneration membranes, heart valve protheses, dura mater repair membranes, soluble bridge plugs and fracturing balls for oil drilling, zinc alloy die castings, electroplated zinc materials, building zinc materials, battery-grade zinc, printing-grade zinc, and zinc-based brazing alloys.

The invention provides an intelligent teaching-assistant system base LLM training method for a drilling simulator, and belongs to the technical field of petroleum drilling large language model training, and the method comprises the steps: obtaining the simulation data of the drilling simulator based on an intelligent teaching-assistant system base large language model, and carrying out the field self-adaptive pre-training; performing fine adjustment on the original weight by utilizing low-rank self-adaption, and performing operation steps and fault diagnosis generation; the method comprises the following steps: constructing an enterprise private knowledge base, training a large language model by utilizing retrieval enhancement generation, and obtaining a trained verification header through explicit supervision; a direct preference optimization loss function is defined, a direct preference optimization loss function of retrieval perception is obtained in combination with the verification head, the large language model is optimized, and large language model training is completed; according to the invention, an external professional knowledge base can be fused, an equipment operation mechanism can be understood, an intelligent assistant architecture with teaching guidance and error diagnosis capabilities is provided, and the intelligent level of the drilling simulator is improved.

The invention is applicable to the technical field of petroleum drilling engineering, and provides a drilling overflow early recognition method based on deep reinforcement learning, which comprises the following steps of: firstly, collecting and preprocessing data, and then constructing and optimizing a drilling overflow early recognition model based on a near-end strategy optimization (PPO) algorithm, and finally, collecting data in real time in drilling operation, preprocessing the data, inputting the data into the model, analyzing the change of the characteristic quantity according to a PPO algorithm, judging whether an overflow sign exists according to an overflow drilling process flow, and if so, early warning according to a Reward function strategy. According to the method, a traditional threshold value method and machine learning are combined, a deep reinforcement learning algorithm is used for optimizing drilling parameter threshold values, characteristic quantity is monitored in real time to capture changes before overflow, historical data are self-learned to recognize an overflow mode, and dependence on field operators is reduced; meanwhile, model decision logic is displayed, understanding and trust of engineers are enhanced, more reliable overflow monitoring guarantee is provided for drilling operation, accident risks are reduced, and wellbore safety is guaranteed.

The invention relates to the technical field of petroleum drilling and production, in particular to an iron roughneck coupling detection method and system based on deep learning, an identification device inputs a first original image into a coupling detection model to obtain coordinates of a coupling in a pixel coordinate system; the backbone network of the coupling detection model is used for extracting image features of an original image, and comprises joint attention modules respectively added behind two down-sampling modules of the backbone network; the joint attention module is used for carrying out attention weight assignment on the first original feature image along a channel dimension and a space dimension and then carrying out feature fusion to obtain a feature fusion image; and the recognition device generates a control instruction according to the coordinates of the coupling in the pixel coordinate system and sends the control instruction to the iron roughneck central control device, so that the iron roughneck central control device controls the iron roughneck to perform screwing-on / screwing-off operation. The system has the beneficial effects that full intelligence and automation of iron roughneck control are realized through the high-precision coupling detection model.

The present application discloses a rigid pressure stabilizing device for an oil drilling pump, belonging to the field of oil drilling equipment. The key technical points of its technical solution include a housing, a separating ring, and a fixing column. Among them, the housing is provided with an inlet and outlet hole for fluid to enter and exit, which is communicated with the discharge pipe of the drilling pump; the separating ring divides the interior of the housing into a first space and a second space, and the two are communicated through a communication hole. A plurality of annular first fins are arranged in the first space, alternately arranged and provided with shunt holes, which helps to stabilize the fluid pressure; a plurality of annular second fins are arranged in the second space, also alternately arranged and provided with shunt holes. The inlet and outlet hole, the first space, the communication hole, and the second space form a circulation channel for fluid to circulate, achieving the effect of improving the working reliability of the drilling pump and effectively reducing the failure rate caused by pressure fluctuations.

The invention provides a tool applied to the field of petroleum drilling, and particularly relates to an electrically-controlled reducing cutter, which has the technical scheme that the extension and retraction of the cutter are accurately controlled by a control base driving motor and an electromagnet, wherein the control base driving motor comprises an MCU (Microprogrammed Control Unit) and a wireless communication module; the control base can receive a ground instruction and transmit an underground working state signal back in real time; meanwhile, the ratchet mechanism is matched with the electromagnet to achieve extending and retracting of the cutter position, and the pawl is always in close contact with the ratchet wheel under the action of the spring. And the lower shell is in threaded connection with the guide shoe. The cutting knife is driven to rotate through the transmission shaft, the cutting knife is controlled to stretch out and retract through the intelligent electric control system, continuous cutting of casing pipes with different pipe diameters can be achieved, the tripping frequency is reduced, and the casing pipe cutting efficiency in the well abandoning operation process is greatly improved.

The invention discloses a system for lowering and recovering a hydraulic pipe of an underwater blowout preventer, which comprises a winch drum, a driving assembly and a bearing seat are respectively arranged on shafts at two ends of the winch drum, the driving assembly is used for driving the winch drum to rotate, and the bearing seat is used for supporting the winch drum; a replaceable chain wheel and a hydraulic slip ring are sequentially mounted on the projecting shaft on the other side of the bearing seat, and the replaceable chain wheel is connected with a cable arrangement device through a chain; a hydraulic pipe of the underwater blowout preventer is led into the winch roller through the hydraulic sliding ring, then led to the cable arrangement device through the winch roller and finally led to the underwater blowout preventer through the cable arrangement device, and the cable arrangement device is used for enabling the hydraulic pipe to be arranged in order along the winch roller. The driving assembly is connected with a pneumatic control system which is used for controlling the driving assembly to drive the winch drum. According to the system, hydraulic pipes with different diameters can be automatically collected and released, the heat dissipation effect is good in the collecting and releasing process, and serious heating of the hydraulic pipes cannot be caused.

The invention belongs to the technical field of oil drilling and discloses self-sealing sampling oil drilling equipment which comprises a rotary drilling rig, a drill bit is mounted at the lower end of a drill rod of the rotary drilling rig, a functional box and a sampling box are mounted on the outer side surface of the upper end of the drill bit in an embedded manner, and mounting holes are formed in the outer side surfaces of the functional box and the sampling box. The functional box and the sampling box are fixedly mounted through mounting holes and bolts, pressure sampling mechanisms are arranged on the surfaces of the functional box and the sampling box, and collection of samples at different depths is triggered by utilizing liquid pressure when liquid is drilled. According to the oil drilling equipment with the self-sealing type sampling function, collection of samples at different depths is automatically triggered by utilizing liquid pressure when liquid is drilled, a pressure triggering mechanism of triggering time is changed by changing spring rigidity, and the samples can be accurately obtained at different target depths; depth errors caused by manual operation or repeated start and stop of drilling equipment are effectively avoided.

The invention discloses a self-adaptive downhole rock annular cutting groove stress unloading percussion bit and a drilling method, and belongs to the technical field of petroleum drilling engineering. The self-adaptive downhole rock annular cutting groove stress unloading percussion bit comprises a bit connector, a cutting groove unloading barrel body and a percussion bit body; the upper end of the percussion bit matrix is fixedly connected with the lower end of the bit joint; the upper end of the grooving unloading barrel matrix is in axial sliding fit with the lower end of the bit joint; a bit pressure transmission disc spring is arranged in an annular space between the bottom end face of the drill bit connector and the top end face of the annular step. A plurality of annular grooving unloading stress teeth are arranged at the lower end of the grooving unloading barrel matrix; impact crushing teeth are arranged at the lower end of the impact drill bit matrix; when the drill bit reaches the well bottom, the annular cutting groove unloading stress teeth make contact with the well bottom earlier than the impact crushing teeth. Through the structural arrangement of the drill bit, annular grooving of shaft bottom rock is achieved, shaft bottom stress is unloaded, the efficiency of impact rock breaking is improved by reducing the strength of the rock, and the drilling speed is increased.

The shock absorber for petroleum drilling is connected between a drill collar and a drill bit and comprises a conversion connector with one end connected to the drill collar, the other end of the conversion connector is connected to one end of a fixing base, and the other end of the fixing base is connected to one end of a shock absorber sleeve. The other end of the shock absorber sleeve is connected to the outer portion of a spline outer cylinder, a spline mandrel is slidably installed in the spline outer cylinder in the axial direction, the bottom end of the spline mandrel is connected to the drill bit, a positioning sleeve is connected to the interior of the adapter substitute, the interior of the positioning sleeve is connected to one end of a spring lining bar, and the other end of the spring lining bar is connected to the other end of the shock absorber sleeve. The spring cushion rod is arranged in the fixing base in an attached mode, the other end of the spring cushion rod abuts against one end of the compression spring, the compression spring is arranged on and abuts against the spring sleeve in a sleeved mode, and the spring sleeve is located in the shock absorber sleeve and abuts against the end, away from the drill bit, of the spline mandrel. Vibration generated when the drill bit works can be absorbed.

The invention relates to the technical field of oil drilling sampling, and particularly discloses an offshore oil engineering exploitation drilling sampling device and method.The offshore oil engineering exploitation drilling sampling device comprises a drill bit and a sampling pipe, an inner barrel is arranged in the drill bit and can synchronously rotate along with the drill bit, the sampling pipe is installed on the lower portion of the inner barrel, and a second cavity and a third cavity are formed in the inner barrel from bottom to top; the second chamber is communicated with the third chamber through a second one-way valve; a follow-up rod is further arranged in the inner cylinder, the bottom of the follow-up rod is arranged at the top of a sampling pipe in a sleeving mode, and a through hole is formed in the top of the sampling pipe. Through the coupling linkage design of the drill bit and the inner cylinder and the mechanical forced coupling mechanism of the coupling groove and the coupling block, coupling is triggered through the sliding rod when the sampling pipe moves upwards, synchronous high-speed rotation of the drill bit, the inner cylinder and the sampling pipe is ensured, oil liquid is disturbed through centrifugal force, the blocking risk of high-viscosity oil liquid at the through hole is remarkably reduced, and the sampling efficiency is improved.

The invention discloses an environment-friendly recycling device for oil-based drilling fluid, and relates to the technical field of petroleum drilling. The solid-liquid separation mechanism is located in one end of the shell and used for filtering solid impurities in the drilling fluid; the control panel is connected with the shell and is used for integrally controlling the equipment; the solid waste is ingeniously used as a filtering medium, solid impurities in the drilling fluid are effectively removed, the separation effect is further improved through the stacking and filtering effects of the solid waste, the solid waste is gradually stacked in the filtering process to form a multi-layer filtering barrier, particle impurities in the drilling fluid can be more thoroughly intercepted, and the filtering effect is improved. By means of the design, the limitation of a single filtering medium in a traditional filtering mode is avoided, the replacement frequency and the maintenance cost of the filtering medium are reduced, and the economical efficiency and the environmental protection property of the whole treatment process are further improved.

The invention relates to the technical field of petroleum drill bits, in particular to a petroleum drilling drill bit device, and aims to solve the technical problems that an existing drill bit cannot give consideration to application range, maintenance cost, tunneling speed and the like. The petroleum drilling drill bit device comprises a drill bit telescopic assembly, a pdc drill bit and a roller bit. The drill bit telescopic assembly comprises a fixed base, a first circular ring, a movable base, a telescopic mechanism and a connecting rod mechanism. The pdc drill bit is arranged on the moving base in a penetrating mode. The roller bits can stretch out and draw back along the axes of the roller bits, and the multiple roller bits are arranged on the moving base around the axis of the pdc drill bit at intervals. Through cooperation of the telescopic mechanism and the connecting rod mechanism, switching tunneling of the two petroleum drilling bits can be achieved, and the petroleum drilling bit device can be suitable for more terrains.

The invention discloses a trigger type low-power-consumption awakening valve opening and closing state online monitoring system, and relates to the technical field of petroleum drilling and production equipment safety, and the system comprises a valve state monitor, a data acquisition and distribution module, a cloud platform and a monitoring terminal; the valve state monitor comprises a limit switch, a main control chip and a Zigbee communication module. Two low-power-consumption modes, namely a power-down mode and a shutdown mode, of the main control chip are adopted, two external interrupts are provided, and the chip can be awakened by the rising edge and the falling edge of the external interrupts. The low-power-consumption Zigbee communication module is used as a dormant terminal, when data needs to be sent, the main control chip pulls down the pin awakening module and sends the data, after sending is completed, the pin is pulled up, the module continues to be dormant, and the low power consumption is further reduced. Therefore, the valve state monitoring instrument can be used for a long time, and the service life of state monitoring equipment is prolonged. In consideration of the requirements of low power consumption and transmission distance, Zigbee communication is used as wireless communication.

The invention relates to the technical field of nondestructive testing, and discloses a full-focusing phased array ultrasonic detection probe for a petroleum drilling tool and a detection method.The full-focusing phased array ultrasonic detection probe comprises a probe body; the probe body is attached to the end part of a drilling tool and the unthreaded outer wall of the drilling tool; a first array element is arranged at the end part, corresponding to a drilling tool, of the probe body and is used for simultaneously exciting to generate ultrasonic waves parallel to the end part of the drilling tool and receiving reflection echoes of internal thread defects of the drilling tool; a second array element is arranged at the position, corresponding to the unthreaded outer wall of the drilling tool, of the probe body and used for receiving reflection echoes of internal thread defects of the drilling tool, and the problem that the number of array elements capable of being arranged is too small due to the fact that a traditional full-focusing phased array ultrasonic detection method is limited by the small size of the end of the drilling tool is effectively solved. And early detection and qualitative and quantitative detection of the defects are realized.

The invention discloses a low-alloy structural steel component for preparing a petroleum drilling tool, which comprises the following elements in percentage by mass: 0.32 to 0.41 percent of carbon, 0.12 to 0.38 percent of silicon, 0.65 to 1.20 percent of manganese, less than or equal to 0.010 percent of phosphorus, less than or equal to 0.008 percent of sulfur, 0.75 to 1.35 percent of chromium, 0.2 to 0.4 percent of molybdenum, less than or equal to 0.3 percent of nickel, 0.01 to 0.04 percent of niobium, 0.005 to 0.015 percent of titanium and the balance of iron. The alloy element ratio is improved and the technological process is optimized on the basis of the prior art, the problems that 4137MA alloy structural steel is insufficient in toughness, coarse and large in grain, limited in strength, poor in high-temperature stability and the like are successfully solved, no technical obstacle exists when the 4137MA alloy structural steel is implemented under the conditions of the prior art, and a petroleum drilling tool made of the 4137MA alloy structural steel is good in mechanical property and good in performance. Compared with the prior art, the material has the advantages of simple structure and high use safety, so that the probability of occurrence of accidents such as thread slipping or rod breakage of the petroleum drilling tool is remarkably reduced, the popularization and application of the material have greater economic benefits and social benefits, the mechanical property and the use reliability of the petroleum drilling tool material are remarkably improved, and a safer and more durable material solution is provided for petroleum drilling engineering.

The invention discloses a sealing joint and a cable installation method, and belongs to the technical field of petroleum drilling equipment, the sealing joint comprises a connecting joint part, an upper joint part and a lower joint part, and a third interval is defined by the inner wall of the connecting joint and the axial end faces of the upper joint part and the lower joint part; and the clamping sleeve assembly is assembled in the third section. When the clamping sleeve component and the clamping sleeve seat body in the third section are assembled, the first contact surface and the second contact surface clamp a steel wire layer of the cable so as to realize hanging and clamping of the cable, and the safety and the reliability are high.

The invention belongs to the technical field of petroleum drilling, and particularly relates to a mud scraping disc and a mud scraping device. The mud scraping disc is an elastic spiral mud scraping disc which surrounds the periphery of the drill rod by at least one circle; the mud scraping disc comprises supporting rings and mud scraping rings, and the supporting rings are spirally stacked in sequence; the outer rings of the mud scraping rings are connected with the inner rings of the supporting rings, the inner rings of the mud scraping rings are attached to the peripheral face of the drill rod, the thickness of the mud scraping rings is smaller than that of the supporting rings, and gaps are reserved between the mud scraping rings in the axial direction. The mud scraping disc is used for solving the problems that the mud scraping disc is not thorough in scraping and inconvenient to install. The spiral mud scraping disc surrounds the periphery of the drill rod, the mud scraping disc forms a whole, the supporting rings are arranged in a stacked mode to guarantee that each circle is pressed, the mud scraping rings can be attached to the surface of the drill rod, and therefore the mud scraping disc is not prone to inclining and overturning compared with a split type U-shaped mud scraping disc, and the mud scraping effect is better.

The invention discloses a drilling machine equipment lubricating oil remaining life prediction method, system and equipment and a storage medium, and relates to the technical field of oil drilling equipment lubricating oil informatization management. The detection data of the target lubricating oil are synthesized into the one-dimensional comprehensive health index, whether the comprehensive health index of the target lubricating oil is in the failure interval or not is judged, if yes, it is judged that the target lubricating oil cannot be continuously used, and otherwise, it is judged that the target lubricating oil cannot be continuously used. If yes, comparing with an existing degradation track library according to the service time and the comprehensive health index of the target lubricating oil, and searching an approximate degradation track as a reference sample; and determining the reference weight of the degradation track by combining the results of four similarity measurements of the time coincidence degree, the comprehensive health index coincidence degree, the equipment service life coincidence degree and the equipment working condition coincidence degree, and comprehensively calculating the residual life of the oil product. The sampling frequency of the lubricating oil of the equipment can be reduced in later maintenance, the labor input is reduced, and the oil change work on a drilling site according to quality is guided.

The present invention discloses an oil drilling equipment with an anti-deviating mechanism and a method thereof, and relates to the technical field of oil extraction. The oil drilling equipment comprises a drill pipe body, a fixed cylinder and a base, wherein the outer surface of the fixed cylinder is fixedly connected with the base near the bottom end, and the drill pipe body is penetrated inside the fixed cylinder, and buffers are arranged around the inner surface of the fixed cylinder; the present invention arranges the buffer, and when the drill pipe body deviates to one side and contacts the steel ball during the rotation process, the connecting cylinder located in the inclination direction of the drill pipe body is squeezed by the spring 1 and the damper along the direction of the limit column, so that the spring 1 and the damper can be used to apply a driving force to the connecting cylinder to keep moving in the vertical direction, so that the inclination amplitude of the drill pipe body can be buffered and adjusted, and the deviation angle of the drill pipe during the process can be reduced.

Oil drilling machine complete equipment comprises a crawler belt, a first platform and a second platform are movably assembled on the crawler belt, a derrick is further arranged on the first platform, the second platform is used for placing a drill rod, a lifting mechanism and a driving mechanism are further assembled on the derrick, and the lifting mechanism is connected with the driving mechanism. The first platform is further provided with a power system and a control machine room, the first platform is further provided with a protection enclosing wall, the protection enclosing wall wraps the derrick, the first platform is further provided with a drill hole, the drill hole is located under the driving mechanism, and a protection mechanism is assembled in the drill hole. A traditional mode that a power source is directly placed on a platform for holding and rotating is replaced through the driving mechanism, noise can be reduced through the driving mechanism, and power utilization is improved. By means of the protection mechanism, the drill rod can be protected without being taken out intermittently, the drill rod protection device can adapt to drill rods of different diameters and cannot be stuck, and the working efficiency is improved while drill rod abrasion is reduced.

The utility model belongs to the technical field of barracks, and particularly relates to a high-temperature-resistant assembly type petroleum drilling barrack which comprises an assembly type barrack body, a shell is installed at one end of the assembly type barrack body, an installation shell is installed at one end of the shell, a winding roller is rotationally connected in the shell, a winding motor is installed in the installation shell, and a winding roller is installed in the winding motor. A winding motor is installed on the shell, the output end of the winding motor is connected with a winding roller, sunshade cloth is connected to the winding roller, the end of the sunshade cloth is connected with a connecting plate, a storage assembly is arranged on the assembly type barrack body, and a rain shelter is installed at one end of the shell. According to the assembly type barrack, the storage assembly is arranged, the sunshade cloth can be folded and unfolded, the assembly type barrack body can be shaded through the sunshade cloth, the purpose of high temperature resistance is achieved, the use comfort degree is improved, and a good living and working environment is provided for drilling workers.

The invention relates to a Pi-CLFormer-based drilling tool jamming risk prediction model, belongs to the field of petroleum engineering drilling safety monitoring, and aims at solving the problems that a traditional drilling tool jamming prediction model is insufficient in precision, low in calculation efficiency, serious in data dependence and the like. Physical features are embedded into a CNN-Transform hybrid architecture through a physical information neural network, calculation complexity is reduced through a local attention mechanism, and then high-precision drilling tool jamming risk real-time prediction is achieved in combination with an adaptive gating mechanism. The problems that a standard Transform is high in calculation complexity and difficult to be used for real-time detection, physical information in a deep network can be diluted and the like are solved, the drill jamming prediction accuracy and timeliness are remarkably improved, and the method can be widely applied to the field of petroleum drilling safety monitoring.

The invention relates to the technical field of electrical instrument management, in particular to a petroleum drilling machine electrical instrument management system and method based on SIL analysis, and the management system comprises a drilling machine electrical instrument function management module and an electrical instrument safety management module. The drilling machine electrical instrument function management module is used for completing periodic management screening and qualitative analysis of a drilling machine electrical instrument, function identification of an electrical instrument system and safety integrity level determination of the electrical instrument system; the electrical instrument safety management module is used for determining the working range of a drilling machine and the management range of electrical instruments of the drilling machine, screening to-be-evaluated scenes, selecting initial events, identifying independent protection layers, determining the average failure probability of all the protection layers, calculating the frequency of all the scenes and determining risk reduction factors. And confirming the security integrity level of the target. Through the management system and method, the problems that the accuracy of risk assessment of an electrical instrument system of a petroleum drilling machine in a scene event is poor and safety assessment is not facilitated can be solved.

The invention belongs to the technical field of petroleum drilling tools, discloses an intelligent-control friction-reducing, resistance-reducing and speed-increasing tool for a screw drill, and achieves the purpose of friction-reducing, resistance-reducing and speed-increasing. The lower portion of the tool is connected with a screw drill through a measurement-while-drilling pup joint, the upper portion of the tool is connected with an upper drill column, and the tool comprises a movable shaft connected with the screw drill; the mechanical transmission system comprises an inner shaft connected with the transmission shaft, the inner shaft rotates along with the transmission shaft to transmit torque, the friction sleeve is dynamically connected with the inner shaft through a gear clutch mechanism, and the driving assembly is used for driving the friction sleeve to move axially so as to adjust the friction force between the friction sleeve and the inner shaft; the tool face angle measuring system is used for measuring the tool face angle of the screw drill in real time and transmitting a measuring signal to the intelligent automatic control system; and the intelligent automatic control system is used for automatically regulating and controlling the friction force between the friction sleeve and the inner shaft according to the received measurement signal so as to balance the reaction torque generated by the drill bit of the screw drill and keep the tool surface stable.

The invention discloses a combined piston rod type support oil cylinder which comprises a cylinder barrel, a mounting flange, a first rod body, a locking nut, a second rod body, a guide sleeve, a sleeve, a front gland and a rear gland, wherein the second rod body, the guide sleeve, the sleeve, the front gland and the rear gland are mounted in the cylinder barrel. The first rod body and the second rod body are in threaded connection to form a piston rod, trapezoidal threads are arranged on a rod body of the first rod body, the locking nut is in threaded connection with the first rod body, and the mounting flange is arranged on a barrel body of the cylinder barrel in a sleeving mode. The problem that the whole piston rod is difficult to maintain is solved, and quick replacement of the threaded section is achieved; hydraulic pressure maintaining is replaced by mechanical locking, and the oil leakage risk of the system is eliminated. The structure is particularly suitable for industrial equipment, oil drilling equipment and other high-load scenes needing long-term stable supporting, and the maintainability and reliability are remarkably improved while the bearing capacity is guaranteed.

The invention relates to the technical field of oil exploitation, in particular to a deep well drill rod conveying device which comprises a material box, sliding openings are evenly formed in the side walls of the two sides of the material box in the height direction of the material box, a lifting plate is arranged in each sliding opening, first lead screws are arranged at the bottoms of the two sides outside the material box, and first sliding blocks are in threaded connection with the first lead screws; a second lead screw is vertically arranged on the first sliding block and is in threaded connection with a supporting plate. After a third lead screw drives a second sliding block to slide, the second lead screw is driven to continue to rotate, the second lead screw drives a supporting plate to lift a lifting plate upwards, and meanwhile the lifting plate pushes the drill rod upwards and fills the position where the discharging drill rod is grabbed by the grabbing assembly. At the moment, the grabbing assemblies are still located at the same height to conduct grabbing operation instead of extending downwards to grab the drill rod, long-stroke vertical movement is not needed, the conveying and transferring time of the drill rod is naturally saved, and the overall operation efficiency of petroleum drilling is improved.

The invention discloses a high-efficiency petroleum drilling fluid circulating system, and particularly relates to the technical field of petroleum exploitation equipment.The high-efficiency petroleum drilling fluid circulating system comprises a supporting frame, a treatment outer barrel is fixedly installed at the top of the supporting frame, a drainage pipe is fixedly installed at the bottom of the treatment outer barrel, and a treatment mechanism is rotationally arranged in the treatment outer barrel; a degassing mechanism is fixedly mounted at the bottom of the supporting frame, a gas guide mechanism is arranged between the treatment mechanism and the degassing mechanism, and a feeding pipe is arranged in the middle of the top end of the treatment mechanism; the treatment mechanism comprises a treatment outer frame, the treatment mechanism is rotatably mounted in the middle of the top end of the treatment outer cylinder through the top of the treatment outer frame, and a sewage discharge frame is fixedly mounted at the bottom end of the treatment outer frame. Centrifugal large-particle inner screening and small-particle outer filtering of the drilling fluid are synchronously achieved, the treatment efficiency of the drilling fluid is improved, and large particles of the inner screening and small particles of the outer filtering are independently discharged.

The invention provides a high-temperature-resistant shale inhibitor as well as a preparation method and application thereof, and belongs to the technical field of petroleum drilling. Natural polymer polyamino acid and carbon-rich solid matter biochar are used as raw materials to prepare the shale inhibitor, the biochar has the advantages of being high in thermal stability, porous, rich in surface oxygen-containing functional groups and the like, the biochar is combined with polyamino acid, and by means of the chemical effect of the polyamino acid and the physical blocking effect of the biochar, the shale inhibitor is prepared. The shale inhibitor can inhibit shale hydration expansion at high temperature and has good hydration dispersibility, and the prepared shale inhibitor is green and environment-friendly and has excellent high temperature resistance.